Religious law

Religious law refers to the notion that the word of God is law. Examples include the Jewish Halakha and Islamic Sharia, both of which mean the "path to follow". Christian canon law also survives in some church communities. The implication of religion for law is unalterability, because the word of God cannot be amended or legislated against by judges or governments. However religion never provides a thorough and detailed legal system. For instance, the Quran has some law, and it acts merely as a source of further law through interpretation, Qiyas (reasoning by analogy), Ijma (consensus) and precedent. This is mainly contained in a body of law and jurisprudence known as Sharia and Fiqh respectively, which had a fairly significant influence on the development of common law,as well as some influence on civil law. Another example is the Torah or Old Testament, in the Pentateuch or Five Books of Moses. This contains the basic code of Jewish law, which some Israeli communities choose to use. The Halakha is a code of Jewish law which summarises some of the Talmud's interpretations. Nevertheless, Israeli law allows litigants to use religious laws only if they choose. Canon law is only in use by members of the clergy in the Roman Catholic Church, the Eastern Orthodox Church and the Anglican Communion.

Until the 18th century, Sharia law was practiced throughout the Muslim world in a non-codified form, with the Ottoman Empire's Mecelle code in the 19th century being first attempt at codifying elements of Sharia law. Since the mid-1940s, efforts have been made, in country after country, to bring Sharia law more into line with modern conditions and conceptions. In modern times, Sharia is merely an optional supplement to the civil or common law of most countries, though Saudi Arabia and Iran's whole legal systems source their law on a codified form of Sharia. During the last few decades, one of the fundamental features of the movement of Islamic resurgence has been the call to restore the Sharia, which has generated a vast amount of literature and affected world politics.